Spindle.



PATENTED MAY 29, 1906.

J. C. POTTER. SPINDLE.

APPLICATION FILED SEPT. as. 1904.

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- UNITED STATES PATENT OEEICE.

JAMES C. POTTER, OF PAWTUCKET, RHODE ISLAND, ASSIGNOR TO AMERICAN SPINDLE COMPANY, OE PAWTUCKET, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

SPINDLE.

Specification of Letters Patent.

Patented May 29, 1906.

Application filed September 23, 1904:. Serial No` 225,630.

To a/ZZ whom it may concern.-

Be it known that I, JAMES C. POTTER, of Pawtucket, in the county of Providence, and in the State of Rhode Island, have invented a certain new and useful Improvement in Spindles, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, in which the iigure is a vertical longitudinal sectionalview of a spindle embodying my invention.

The object of my invention has been to provide a spindle embodying the invention which is the subject of Letters Patent granted upon my application to the American Spindle Company, l of Pawtucket, Rhode Island, for spinning-spindles, August 18, 1903, No. 736,544, in which no spring or weight shall be used, but in which fluid-pressure shall be used to serve the function of the spiral spring in my aforesaid patent, and to such ends my invention consists in the spindle hereinafter specified and claimed.

In carrying my invention into practice I provide a bolster-case A having a bolster B journaled therein, the bolster having a shoulder b at its upper end which bears upon the upper end of the bolster-case. The lower end of the bolster is preferably reduced in diameter and a shell D is secured to such` end, as by a pin E. The shell is provided with a conical seat d, in which is mounted the spherical up er end F of a rod G, which latter eX- tends t rough openings in the lower end of the said shell and inthe lower end of the bolster-case. A shell G is secured to the lower end of the bolster-case by any form of oiltight joint, and a piston H, secured to the lower end of the rod G, fits loosely within said shell. A valve or valves are formed in the piston, as by tapered plugs I seated in taered holes h. The plugs I may, if desired,

ave stems i, in which are secured removable ins 'i' so as to prevent their esca ing from the holes h. A yielding body, suc as oil, is interposed between the bolster and the bolster-case, and the shell G and bolster-case are filled with oil or other iiuid.

In the operation of my spindle-bearing upon the principle of my aforesaid patent the bolster seeks to move laterally in order to place the axis of revolution of the spindle in line with the center of gravity of the weight being carried. This causes a slight rising of the piston, and as the valves open upwardly the body of oil above the piston can only reach the lower side of the piston, which it must do to permit the piston to rise, by passing between the piston and the oil-shell. This space is made sufiiciently small so that the proper resistance is secured. When the bolster straightens up again,the piston simply sinks through the oil, the oil rising through tllle holes h and slightly lifting the conical ugs.

It is obvious that various changes can be made in the above-illustrated construction which will be within the sco e of my invention, and I do not desire to imit myself beyond the requirements of the prior art and the letter of my claims.

Having thus described my invention, what I claim isf- 1. In a spindle-bearing, the combination ofa bolster, a bolster-case, a piston secured to the lower end of the bolster-case, and means for offering resistance to the upward movement of the piston while permitting a free downward movement thereof.

2. In a spindle-bearing, the combination of a bolster, a bolster-case, a rod jointedly secured to the lower end of the bolster-case, a

piston secured to said rod and loosely fitting the bolster-case, and valves in said piston.

3. In a spindle-bearing, the combination of a bolster, a bolster-case, a rod jointedly secured to the lower end of the bolster, a piston secured to said rod, and loosely fitting the bolster-case, and valves in said piston consisting of conical plugs seated in conical openings. n

In testimony that I claim the foregoing I have hereunto set my hand.

W. WALLACE POTTER, EARL H. ROBERTS. 

